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jim-sdl.c
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jim-sdl.c
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/*
* Jim - SDL extension
*
* Copyright 2005 Salvatore Sanfilippo <antirez@invece.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the Jim Tcl Project.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <jimautoconf.h>
#include <SDL.h>
#if SDL_MAJOR_VERSION == 2
#include <SDL2_gfxPrimitives.h>
#ifdef HAVE_PKG_SDL2_TTF
#include <SDL_ttf.h>
#endif
#else
#include <SDL_gfxPrimitives.h>
#endif
#include <jim.h>
#include <jim-subcmd.h>
static int jim_sdl_initialised;
typedef struct JimSdlSurface
{
#if SDL_MAJOR_VERSION == 2
SDL_Window *win;
SDL_Renderer *screen;
SDL_Texture *texture;
#ifdef HAVE_PKG_SDL2_TTF
TTF_Font *font;
#endif
#else
SDL_Surface *screen;
#endif
} JimSdlSurface;
static void JimSdlSetError(Jim_Interp *interp)
{
Jim_SetResultString(interp, SDL_GetError(), -1);
}
static void JimSdlDelProc(Jim_Interp *interp, void *privData)
{
JimSdlSurface *jss = privData;
JIM_NOTUSED(interp);
#if SDL_MAJOR_VERSION == 2
SDL_DestroyRenderer(jss->screen);
SDL_DestroyWindow(jss->win);
#ifdef HAVE_PKG_SDL2_TTF
if (jss->font) {
TTF_CloseFont(jss->font);
}
#endif
#else
SDL_FreeSurface(jss->screen);
#endif
Jim_Free(jss);
}
static int JimSdlGetLongs(Jim_Interp *interp, int argc, Jim_Obj *const *argv, long *dest)
{
while (argc) {
jim_wide w;
if (Jim_GetWideExpr(interp, *argv, &w) != JIM_OK) {
return JIM_ERR;
}
*dest++ = w;
argc--;
argv++;
}
return JIM_OK;
}
static void JimSdlClear(JimSdlSurface *jss, int r, int g, int b, int alpha)
{
#if SDL_MAJOR_VERSION == 2
SDL_SetRenderDrawColor(jss->screen, r, g, b, alpha);
SDL_RenderClear(jss->screen);
#else
SDL_FillRect(jss->screen, NULL, SDL_MapRGBA(jss->screen->format, r, g, b, alpha));
#endif
}
/* Process the event loop, throwing away all events except quit.
* On quit, return JIM_EXIT.
* If necessary, this can be caught with catch -exit { ... }
*/
static int JimSdlPoll(Jim_Interp *interp)
{
SDL_Event e;
while (SDL_PollEvent(&e)) {
if (e.type == SDL_QUIT) {
Jim_SetResultInt(interp, 0);
return JIM_EXIT;
}
}
return JIM_OK;
}
static int jim_sdl_subcmd_free(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_DeleteCommand(interp, argv[0]);
return JIM_OK;
}
/* [sdl flip] - present the current image, clear the new image, poll for events.
* Returns JIM_EXIT on quit event
*/
static int jim_sdl_subcmd_flip(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
#if SDL_MAJOR_VERSION == 2
SDL_RenderPresent(jss->screen);
#else
SDL_Flip(jss->screen);
#endif
JimSdlClear(jss, 0, 0, 0, SDL_ALPHA_OPAQUE);
return JimSdlPoll(interp);
}
/* [sdl poll ?script?] - present the current image, poll for events.
* Returns JIM_EXIT on quit event or JIM_OK if all events processed.
*
* If the script is given, evaluates the script on each poll loop until
* either quit event is received or the script returns something other than JIM_OK.
*/
static int jim_sdl_subcmd_poll(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
int ret = JIM_OK;
#if SDL_MAJOR_VERSION == 2
JimSdlSurface *jss = Jim_CmdPrivData(interp);
SDL_RenderPresent(jss->screen);
#endif
while (ret == JIM_OK) {
ret = JimSdlPoll(interp);
if (ret != JIM_OK || argc != 1) {
break;
}
ret = Jim_EvalObj(interp, argv[0]);
}
return ret;
}
static int jim_sdl_subcmd_clear(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[4];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 3) {
vals[3] = SDL_ALPHA_OPAQUE;
}
JimSdlClear(jss, vals[0], vals[1], vals[2], vals[3]);
return JIM_OK;
}
static int jim_sdl_subcmd_pixel(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[6];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 5) {
vals[5] = SDL_ALPHA_OPAQUE;
}
pixelRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5]);
return JIM_OK;
}
static int jim_sdl_subcmd_circle(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[7];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 6) {
vals[6] = SDL_ALPHA_OPAQUE;
}
circleRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6]);
return JIM_OK;
}
static int jim_sdl_subcmd_aacircle(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[7];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 6) {
vals[6] = SDL_ALPHA_OPAQUE;
}
aacircleRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6]);
return JIM_OK;
}
static int jim_sdl_subcmd_fcircle(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[7];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 6) {
vals[6] = SDL_ALPHA_OPAQUE;
}
filledCircleRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6]);
return JIM_OK;
}
static int jim_sdl_subcmd_rectangle(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[8];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 7) {
vals[7] = SDL_ALPHA_OPAQUE;
}
rectangleRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6], vals[7]);
return JIM_OK;
}
static int jim_sdl_subcmd_box(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[8];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 7) {
vals[7] = SDL_ALPHA_OPAQUE;
}
boxRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6], vals[7]);
return JIM_OK;
}
static int jim_sdl_subcmd_line(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[8];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 7) {
vals[7] = SDL_ALPHA_OPAQUE;
}
lineRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6], vals[7]);
return JIM_OK;
}
static int jim_sdl_subcmd_aaline(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[8];
if (JimSdlGetLongs(interp, argc, argv, vals) != JIM_OK) {
return JIM_ERR;
}
if (argc == 7) {
vals[7] = SDL_ALPHA_OPAQUE;
}
aalineRGBA(jss->screen, vals[0], vals[1], vals[2], vals[3], vals[4], vals[5], vals[6], vals[7]);
return JIM_OK;
}
#ifdef HAVE_PKG_SDL2_TTF
static int jim_sdl_subcmd_font(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long size;
if (Jim_GetLong(interp, argv[1], &size) != JIM_OK) {
return JIM_ERR;
}
if (jss->font) {
TTF_CloseFont(jss->font);
}
else {
TTF_Init();
}
jss->font = TTF_OpenFont(Jim_String(argv[0]), size);
if (jss->font == NULL) {
Jim_SetResultFormatted(interp, "Failed to load font %#s", argv[0]);
return JIM_ERR;
}
TTF_SetFontHinting(jss->font, TTF_HINTING_LIGHT);
return JIM_OK;
}
static int jim_sdl_subcmd_text(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss = Jim_CmdPrivData(interp);
long vals[6];
SDL_Surface *surface;
SDL_Texture *texture;
SDL_Rect rect;
SDL_Color col;
if (!jss->font) {
Jim_SetResultString(interp, "No font loaded", -1);
return JIM_ERR;
}
if (JimSdlGetLongs(interp, argc - 1, argv + 1, vals) != JIM_OK) {
return JIM_ERR;
}
col.r = vals[2];
col.g = vals[3];
col.b = vals[4];
col.a = (argc == 7) ? vals[5] : SDL_ALPHA_OPAQUE;
#ifdef JIM_UTF8
surface = TTF_RenderUTF8_Blended(jss->font, Jim_String(argv[0]), col);
#else
surface = TTF_RenderText_Blended(jss->font, Jim_String(argv[0]), col);
#endif
texture = SDL_CreateTextureFromSurface(jss->screen, surface);
rect.x = vals[0];
rect.y = vals[1];
rect.w = surface->w;
rect.h = surface->h;
SDL_RenderCopy(jss->screen, texture, NULL, &rect);
SDL_DestroyTexture(texture);
SDL_FreeSurface(surface);
return JIM_OK;
}
#endif
static const jim_subcmd_type sdl_command_table[] = {
{ "free",
NULL,
jim_sdl_subcmd_free,
0,
0,
JIM_MODFLAG_FULLARGV,
},
{ "flip",
NULL,
jim_sdl_subcmd_flip,
0,
0,
},
{ "poll",
"?script?",
jim_sdl_subcmd_poll,
0,
1,
},
{ "clear",
"red green blue ?alpha?",
jim_sdl_subcmd_clear,
3,
4,
},
{ "pixel",
"x y red green blue ?alpha?",
jim_sdl_subcmd_pixel,
5,
6,
},
{ "circle",
"x y radius red green blue ?alpha?",
jim_sdl_subcmd_circle,
6,
7,
},
{ "aacircle",
"x y radius red green blue ?alpha?",
jim_sdl_subcmd_aacircle,
6,
7,
},
{ "fcircle",
"x y radius red green blue ?alpha?",
jim_sdl_subcmd_fcircle,
6,
7,
},
{ "rectangle",
"x1 y1 x2 y2 red green blue ?alpha?",
jim_sdl_subcmd_rectangle,
7,
8,
},
{ "box",
"x1 y1 x2 y2 red green blue ?alpha?",
jim_sdl_subcmd_box,
7,
8,
},
{ "line",
"x1 y1 x2 y2 red green blue ?alpha?",
jim_sdl_subcmd_line,
7,
8,
},
{ "aaline",
"x1 y1 x2 y2 red green blue ?alpha?",
jim_sdl_subcmd_aaline,
7,
8,
},
#ifdef HAVE_PKG_SDL2_TTF
{ "font",
"filename.ttf size",
jim_sdl_subcmd_font,
2,
2,
},
{ "text",
"string x y red green blue ?alpha?",
jim_sdl_subcmd_text,
6,
7,
},
#endif
{ NULL }
};
/* Calls to commands created via [sdl.surface] are implemented by this
* C command. */
static int JimSdlHandlerCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const jim_subcmd_type *ct = Jim_ParseSubCmd(interp, sdl_command_table, argc, argv);
return Jim_CallSubCmd(interp, ct, argc, argv);
}
static int JimSdlSurfaceCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
JimSdlSurface *jss;
char buf[128];
long vals[2];
const char *title;
if (argc != 3 && argc != 4) {
Jim_WrongNumArgs(interp, 1, argv, "xres yres ?title?");
return JIM_ERR;
}
if (JimSdlGetLongs(interp, 2, argv + 1, vals) != JIM_OK) {
return JIM_ERR;
}
if (!jim_sdl_initialised) {
jim_sdl_initialised++;
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
JimSdlSetError(interp);
return JIM_ERR;
}
#if SDL_MAJOR_VERSION == 2
SDL_SetHint(SDL_HINT_RENDER_VSYNC, "1");
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");
#endif
atexit(SDL_Quit);
}
title = (argc == 4) ? Jim_String(argv[3]) : "sdl";
jss = Jim_Alloc(sizeof(*jss));
memset(jss, 0, sizeof(*jss));
#if SDL_MAJOR_VERSION == 2
/* Try to create the surface */
jss->win = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, vals[0], vals[1], 0);
if (jss->win) {
jss->screen = SDL_CreateRenderer(jss->win, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED);
if (jss->screen) {
/* Need an initial SDL_PollEvent() to make the window display */
SDL_PollEvent(NULL);
}
else {
SDL_DestroyWindow(jss->win);
}
}
#else
jss->screen = SDL_SetVideoMode(vals[0], vals[1], 32, SDL_SWSURFACE | SDL_ANYFORMAT);
if (jss->screen) {
SDL_WM_SetCaption(title, title);
}
#endif
if (jss->screen) {
JimSdlClear(jss, 0, 0, 0, SDL_ALPHA_OPAQUE);
}
else {
JimSdlSetError(interp);
Jim_Free(jss);
return JIM_ERR;
}
/* Create the SDL command */
snprintf(buf, sizeof(buf), "sdl.surface%ld", Jim_GetId(interp));
Jim_CreateCommand(interp, buf, JimSdlHandlerCommand, jss, JimSdlDelProc);
Jim_SetResult(interp, Jim_MakeGlobalNamespaceName(interp, Jim_NewStringObj(interp, buf, -1)));
return JIM_OK;
}
int Jim_sdlInit(Jim_Interp *interp)
{
Jim_PackageProvideCheck(interp, "sdl");
Jim_CreateCommand(interp, "sdl.screen", JimSdlSurfaceCommand, NULL, NULL);
return JIM_OK;
}